1. Division of Gastroenterology, Matsuyama Red Cross Hospital, Ehime, Japan
2. Department of R/D for Surgical Support System, Center for Advanced Medical Innovation, Kyushu University, Fukuoka, Japan
3. Department of Pathology, Matsuyama Red Cross Hospital, Ehime, Japan
4. Department of Respiratory Medicine, Matsuyama Red Cross Hospital, Ehime, Japan